I don't know?

I had a friend ask me today when I was going to start having babies.  When I am asked these questions or ones similar I feel this overwhelming need to just bawl my eyes out like a baby.  I feel like this question triggers all the heartbreak and sorrow within me.  I mean how am I supposed to answer this question?  I hate to try to explain (mostly because I can’t get through it without crying.)  I can’t seem to explain to anyone all the chaotic feelings that are inside of me.  I know that most people don’t want to know my whole infertility and life story.  These people who ask this question and others really aren’t trying to hurt me on purpose.  I have to remind myself that they just don’t understand.  So I usually just go with:  1) “Whenever they decide they want to come.” Or 2) “I don’t know, maybe one of these days.” Not always the best answer but hey it will do for now.